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The structure and fixing method of the punch in the metal stamping mold
Stamping parts processing plant, processing metal stamping parts, electronic fireworks gas cylinder accessories, various mechanical parts, etc. Today, let’s briefly talk about the structure and fixing method of the punch in the metal stamping mold; first, look at the round standard convex The structure and fixing form of mold 1, round standard punch are shown in figure (a). The steps used are to increase the rigidity of the punch. The punch and the fixed plate adopt the transitional fit of H7/m6. (E) and (f) are quick-change small punches, which are more convenient for maintenance and replacement; 2. For the specific structure and requirements of round standard punches, please refer to the design information of metal stamping molds, and the shape and position of punches of other shapes. Tolerances, surface roughness and other requirements can be based on round standard punches; 2. Special-shaped punches In most cases, the cross-section of the punches is non-circular, which is called special-shaped. The structure and fixing method of special-shaped punches are shown in the figure ( b) In order to facilitate the processing of the punches, the special-shaped punches are made into equal sections, called straight-through type, and the fixing method adopts N7/h6, P7/h6 riveting and fixing, as shown in Figure (b), this fixing method It is necessary to add a stopper pin at the joint of the fixed end to prevent rotation, and it can also be fixed with a low melting point alloy or adhesive, as shown in Figures (c) and (d); when punching small holes with a diameter similar to the thickness of the material, it should be Consider adopting measures to strengthen the strength and rigidity of the punch to protect the punch, generally including adding a punch sheath, figure (g) and guiding the punch, etc. For larger cross-sectional dimensions, you can also use screws, The pin is directly fixed, as shown in Figure (h); the article recommends: How many steps are there when designing a stamping die? Previous post: How many steps are there in the design of stamping molds?